At issue in this case was whether three software programmers who created the BnetD game server -- which interoperates with Blizzard video games online -- were in violation of the Digital Millennium Copyright Act (DMCA) and Blizzard Games' end user license agreement (EULA).

In a legal battle over Internet music storage that could impact innovation and free expression on the Internet EFF Public Knowledge and other public interest groups asked a federal judge in an amicus brief to protect the "safe harbor" rules for online content in EMI v. MP3Tunes.

Junger sought an injunction against the enforcement of provisions of the International Traffic in Arms Regulations that require him to get the permission of the State Department's Office of Defense Trade Controls (the "ODTC") before he can communicate information about cryptographic software to f

EFF and a coalition of academics and public policy groups are urging a federal judge to dismiss a criminal indictment that could give websites extraordinary power to dictate what behavior becomes a computer crime.

In 2005, Macrovision sued Sima to block the sale of the Sima CopyThis! (CT-1, CT-Q1, CT-100, CT-2, CT-200) and GoDVD (SCC, and SCC-2) products, which are designed to digitize analog video, such as the analog video outputs of DVD players and analog VCRs.

EFF defended the right of innovators to build new technologies without begging Hollywood's permission first.

Hollywood has hoped to control innovation by overturning the "Betamax doctrine" - the bedrock principle that the developer of a technology with substantial legal uses cannot be held liable for users' copyright violations. In the Grokster case, 28 of the world's largest entertainment companies sued the distributors of peer-to-peer (P2P) file-sharing software. EFF defended one of the software companies all the way to the U.S. Supreme Court, which refused to overturn the Betamax doctrine or to force technology companies to redesign multipurpose technologies. Meanwhile, EFF helped block the INDUCE Act, a bill that would have severely undermined the Betamax doctrine.

EFF has urged a federal judge not to let television networks squash an innovative streaming service with a bogus copyright infringement lawsuit. In an amicus brief, EFF and Public Knowledge asked the court to block a preliminary injunction that could prevent Aereo Inc.

EFF helped convince the U.S. Supreme Court to invalidate a dangerous patent law precedent that threatened free speech and consumers' rights.

The court unanimously held that issuing automatic injunctions in patent cases improperly removed discretion from trial judges to weigh competing factors, including the effect that enforcing the patent would have on the public interest. This followed the reasoning outlined in a friend-of-the-court brief filed by EFF, which urged the justices to overrule the lower court and protect the public interest in free speech, innovation, and education.

EFF urged a federal appeals court to protect the rights of start-up innovators working to improve TV viewing and other entertainment experiences, arguing that big content companies should not be allowed to block add-on technology with baseless copyright claims.

In October 2013, NY State Attorney General Eric Schneiderman issued a sweeping subpoena seeking identification, financial, and other information on effectively all New York Airbnb “Hosts,” those users offering living space for rent.

EFF fought for open, transparent governance of the domain name system.

Karl Auerbach began asking for Internet Corporation for Assigned Names and Numbers's (ICANN) corporate records in November 2000, shortly after he was voted as the North American Elected Director of ICANN. ICANN management proceeded to obstruct his access to these records. Represented by EFF, Auerbach successfully sued to gain his rightful access under the law.

The Supreme Court's ruling in Sony v. Universal Studios (aka the Betamax case) is a landmark copyright precedent that has sheltered a wide array of technology innovators from lawsuits at the hands of the entertainment industries.

EFF established that computer code is speech and shielded the developers of privacy-protecting software from government censorship.

In 1995, researcher Dan Bernstein planned to distribute an encryption program he had written that could help prevent strangers from snooping on online communications, discovering passwords, and stealing credit card numbers. But draconian federal laws restricted the publication of his program, treating privacy protection as a potential threat to national security. EFF successfully sued the government on behalf of Bernstein, and a federal court affirmed, for the first time, that software code deserves First Amendment protection.